Durablow Air-In Stainless Steel Crawl Space Foundation Dual Fans Ventilator + Built-in Dehumidistat + Freeze Protection Thermostat + Radon Mitigation (Stainless Steel 430)

Durablow 220 CFM Air-In Stainless Steel Crawl Space Vent Fan, Dual Fans with Dehumidistat & Thermostat, Foundation Vent, Radon Mitigation, for Crawl space, Basement (Stainless steel 430, M2D-S430-N)

Airthings Corentium Home Radon Detector 223 Portable, Lightweight, Easy-to-Use, (3) AAA Battery Operated, USA Version, pCi/L

Airthings 2950 Wave Radon - Smart Radon Detector with Humidity & Temperature Sensor – Easy-to-Use – Accurate – No Lab Fees – Battery Operated - Free App